even messaging your scalp with out oil is great! though adding a oil, or a mixture of oils can really be beneficial in aiding with the growth. a few things, first choose a light oil, if your going to use essential oils, only use a few drops.
Same base oils: argan oil, jojoba oil rosehip oil
same essential oils that can help in growth: rosemary, tea tree, peppermints.
Now ive made a mixture of rosemary, tea tree peppermints and argan oil, which i rubb into my scalp every night. i get same on the pads of my finger tips, rub them together then just message my scalp, i try to do it so i dont get it on my hair, cause i want the oil on my scalp. i just keep doing it till ive done my entire scalp, which takes about 5 mins. its part of my routine, so i dont forget.
ooh and hair grows quicker during the day, so i always message it at night, after my shower and before i go to bed.
hope that helps ladies!